Dry-gas fire-extinguisher.



No. 866,109. PATBNTED SEPT. 17, 1907 BRENT.

DRY GAS FIRE EXTINGUISHBR.

' APPLICATION FILED DEO.13, 1906.

[NVENTOH 5 Allows UNITED STATES PATENT onnicis. Q

CHARLES BRENT, OF BRANDON, MANITOBA,

CANADA, ASSIGNOR TO EVER-READY FIRE EXTINGUISHER 00., OF BUFFALO, NEW YORK, A CORPORATION OF NEW JERSEY.

DRY-GAS FI-RE-EXTINGUISKER.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed December 13, 1906. Serial No. 347,700.

.To all whom it may concern:

Be it known that 1, CHARLES BRENT, residing at Brandon, in the Province of Manitoba, Dominion'of Canada, have invented certain new and useful Improvements in Dry-Gas Fire-Extinguishers, of which the following is a specification.

It has been found in practice generally that the ordinary fire extinguisher doesnot meet all of the demands or is not capable of being used in many places on account of the peculiar location of the fire, or the peculiarity of the fire itself. An instance of this" kind is best illustrated by an electrical switch. board where it is disastrous to use liquid of any hind. It has been found however, that carbonic acidgasis very effective in extinguishing a fire of this sort, but heretofore the practical use of the gas has been rendered unavailable on account of the fact that the rapid expansion of the gas freezes theconnections and prevents the flow of the gas just at the time when it is most needed.

It isthe object of this invention therefore, to provide an apparatus wherein carbonic acid gas may be suppliod'in a continuous stream to a suitable hose or other delivery device in a manner such that the entinguisher may be used continuously so long as the supply of gas holds out. v I More specifically the invention contemplates the use of a tank provided with a suitable delivery hose and nozzle and also with a suitable connection leading to a carbonic acid gas supply and arranging in such connection a reducing valve adapted to maintain a certain pressure in the tank wjhile itis standing idle, and also during the time it'is in use.

The invention may be further briefly summarized as consisting in a construction and combination-of parts shown one form in the drawings which meets the re-' quirements very effectively and in such embodiment 1 i represents an expansion tank, provided with a plug 2 at the top, and a valve 3 towhich is connected a. hose 4,

provided with a nozzle 5 on the end thereof. This tank l is connected by a pipe 6, with a reducing valve 7, having agage 8, and in turn connected by a pipe. 9, with a coupling 10, having a pair of valves 11, arranged to control the flow of carbonic acid gas from suitable containers 12.

It will be seen from the foregoing description and from the construction of the parts that the valve 3 may be closed, and gas from the containers maybe admitted to the'tank at anypressure which is set by the valve 7,

and indicated upon the gage 8. The apparatus is then I ready for use, w

Upon the breaking out of a fire the valve 3 is opened and the gas from the tank 1 is permittedtb be discharged through the nozzle 5, as the gas in the tank is discharged additional gas is supplied from the gas containers and at the pressure indicated upon the gage.

The tank 1 is necessary in the use of carbonic acid gas as a fire extinguishing medium for the reason that if the gas is not expanded it will freeze in the pipe and connections. A p

Having now described my invention, I claim:

1. In a dry gas fire extinguisher, in combination, a container for liquefied carbonic acid gas, an expansion tank adapted to receive expanded gas from said container, and delivery means in direct communication with said expansion tank whereby the expanded gas may be delivered di rectly upon the burning' material. I

2. .In a dry gas fire extinguisher, in combination, a gas trainer. for liquefied carbonic acid gas. an expansion tank communicating with said gas container, means for reiiue ing the pressure of the gas as it enters said expansion tank, and-a suitable delivery means in direct communication with said expansion tank for supplying the expanded gas for use upon a fire.

3. in a. dry gas tire extinguisher, in combination, a gas 30- container for liquefied carbonic acid gas, an expansion tank, connections between said gas container and said expansion tank, a reducingyakve in said connections for reducing the pressure of the gas entering said expansion tank, and suitable delivery means connected directly to said expansion tank and adapted to supply the expanded gas for use upon a fire.

In testimony whereof I affix my signature in the pres- JOHN M. Pnovoos'r.

I iflent in u tGas Fire-Extinguishers, m

It is hereby certified that in Letters Patent No. 866,109, granted September 17, 1907,

upon the application of Charles Brent, of Brandon, Manitoba, Canada, for an improveerror appears in the printed specification requiring correction, as follows: In line 74 the werd tainer and that the said Letters Patent should be read with this cqrreetion therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 22d day of October, A. 1)., 1907.

SEAL Q 0. 0. BILLINGS, Acting Commissioner of Patents.

should read container; 

